DE4126545A1 - THREE-RING ROLLER BEARING FOR THE PINS OF THE CYLINDERS OF PRINTING MACHINES - Google Patents

Abstract

The invention relates to a triple-ring rolling contact bearing, primarily for compensating for unavoidable small deformations and errors in bore alignment for cylinders of printing machines, in particular blanket cylinders with rows of rolling elements arranged between the bearing rings (2.1, 3.1, 6), where, to increase the rigidity of the rolling contact bearing, the rows (9; 10) of the rolling contact bearings are constructed to accept radial forces, comprising rows of cylinder roller bearings (10.1; 10.2), next to which are provided, at at least one axial end, ball bearings or rows (9.1; 9.3) of cross-type roller thrust bearings to accept axial forces, and the three bearing rings (2.1, 3.1, 6) can be braced axially and/or radially against one another by suitable means (11 to 18). <IMAGE>

Description

The invention relates to a three-ring roller bearing for the pin of Cylinders of printing machines, in particular for the pins of Blanket cylinders, according to the preamble of the first patent saying.

Bearings for the pins of blanket cylinders in printing machines must be designed so that the blanket cylinder is eccentric is adjustable so that it connects to another cylinder can be switched off. It is also necessary that such rolling Bearings in the radial direction are completely free of play and in be sufficiently rigid in the axial direction, since otherwise Misprints result.

Three-ring roller bearings with radial, axially and / or radially braced against each other, between which Rolling bearing rows are arranged, for. B. from DE-OS 14 00 391 and DE-OS 36 43 295 known.

For the eccentric adjustment or displacement of the cylinders these bearings with an eccentric intermediate ring, d. H. With provided a ring with eccentric inner and External raceways is provided. Due to misalignment of the hole in the The cylinder pin may tilt. The The publications mentioned cannot be inferred whether they are for Compensation of the misalignment can be preloaded sufficiently radially and automatic alignment of the bearing to the journal allow.  

Furthermore, it is known from DE-OS 33 24 811 for a rolling position the pin of blanket cylinders in printing presses separate Radial and axial bearings to provide the rigidity of the Wälzla increase. This roller bearing does not allow compensation Misalignment of the hole in the frame because of the bearing Centering in the machine frame is predetermined in its position and its automatic alignment to the trunnion is not guaranteed is.

To compensate for misalignments, it is from DE-OS 36 35 569 known, at least the outer contour of an outer bearing ring a cylindrical plain bearing to form a pendulum surface, wherein the outer bearing ring of the outer bearing and an inner bearing ring of the Bottom bracket are eccentric, so that the double texzen tric play-free slide bearing itself for journaling the cylinder can align itself.

The object of the invention is a for cylinders of printing presses Rolling bearings create alignment with high rigidity Error in the hole in the frame and any deflections compensated.

This task is solved by the one in the license plate of the first Features listed features. Further training results itself from the subclaims.

By separating into separate radial bearings and thrust bearings, which in axial and radial direction can be braced, arises Three-ring roller bearing with high rigidity, the misalignment of the bore balances and aligns itself to the journal.

The invention is described below with reference to two drawings in one Embodiment explained in more detail.

It shows

Fig. 1 an inventive three-ring roller bearing in longitudinal section, with ball bearings for axial support.

Fig. 2 shows a three-ring roller bearing according to the invention in longitudinal section, with crossed roller axial bearing for axial support.

The three-ring roller bearing consists of a connected to the pin 4 of a blanket cylinder 7 inner bearing ring 2.1 of the inner bearing 2 , which is provided with a concentric to the pin 4 outer raceway.

The three-ring roller bearing also has an outer bearing ring 3.1 of the outer bearing 3 in a bearing housing 1 , which is seen with an inner raceway 1 which is concentric with the bore of the bearing housing 1 .

Provided between the inner bearing ring 2.1 and outer bearing ring 3.1 is a one-piece eccentric intermediate ring 6 which supports the raceway for the inner bearing 2 and outer bearing 3 and which can be pivoted in the circumferential direction by actuating means 5 located outside the bearing housing 1 .

For radial support between the spigot 4 verbun which inner bearing ring 2.1 and the eccentric intermediate ring 6 on the one hand and between the outer bearing ring 3.1 and the eccentric intermediate ring 6 on the other hand cylindrical roller bearing rows 10.1 , 10.2 are provided, with in addition to the cylindrical roller bearing row 10.1 at at least one axial end Ball bearing rows or comparable axial bearing rows z. B. Cross roller axial bearings 9.3 and 9.1 are arranged for the separate absorption of axial forces.

To accommodate the rows of roller bearings 9 , 10 , on the bearing rings 2.1 , 3.1 , 6 on at least one axial end, bore and / or jacket-side shoulders 15 to 18 are provided. In addition, the three bearing rings 2.1 , 3.1 , 6 are braced axially and / or radially against one another by means 11 to 18 .

The outer bearing ring 3.1 and the eccentric intermediate ring 6 are arranged by offset, in grooves of the outer bearing ring 3.1 perpendicular to the bearing center axis 8 arranged positively connected to the outer bearing ring 3.1 wedges 11 is held axially, the wedge 11 in the circumferential direction, eg. B. 120 ° offset, coaxial to the hole in the frame, are fixed by screws 12 in axial holes on the bearing housing 1 .

The inner bearing ring 2.1 , the eccentric intermediate ring 6 and the pin 4 are braced by means of an adjusting nut 14 or not illustrated Darge set screws or the like mutually and against the outer bearing 3 .

The proposed design makes it possible to pivot the eccentric intermediate ring 6 without play and friction by a predetermined angle in order to switch the blanket cylinder on or off to a further cylinder.

The rigidity of the three-ring roller bearing is guaranteed by the separate arrangement of radial and axial bearing rows. Minor deformation and alignment errors can be compensated for, since the bearing rings 2.1 , 3.1 , 6 can be braced in the axial and radial direction in the interaction of the wedges 11 without harmful force.

Should larger bore misalignments be compensated, to provide additional measures.

For example, the outer bearing ring 3.1 can have a slightly spherical surface on the outside and the wedge 11 can be pretensioned by a spring. As a spring z. B. spring washers, springs or the wedge 11 itself can be used. The axial tilting forces that occur have no appreciable influence on the radially relatively rigid bearing unit. To increase or decrease the bearing preload, the inner bearing ring 2.1 and the pin 4 with tapered active surfaces 13 , z. B. 1:50, provided on the mutually facing surfaces. The bearing ring 2.1 is displaceable and the bearing play can be adjusted via the adjusting nut 14 and the spring 19 generating a counterforce, which is arranged between the cylinder shoulder 7.1 and the inner bearing ring 2.1 . Hydraulic pressure in conjunction with oil grooves makes moving easier.

It is of course also conceivable that from the state of the Technology known measures on plain bearings or roller bearings to add what deviations from the bearing geometry (angle compensate for errors, e.g. B. Reducing the support width of the Bearing rings, reduction of the bearing width, tilting of the Bearing rings by tilting around an edge, different designs of tilting segments with and without springs etc.

Reference list

1 bearing housing
2 inner bearings
2.1 inner bearing ring
3 outer bearings
3.1 outer bearing ring
4 pins
5 actuators
6 eccentric intermediate ring
7 blanket cylinders
7.1 cylinder shoulder
8 central bearing axis
9 row of axial bearings
9.1 Cross roller axial bearing series
9.2 Row of ball bearings
9.3 Rows of ball bearings
10 radial bearing series
10.1 Cylindrical roller bearing series
10.2 Cylindrical roller bearing series
11 wedge
12 screw
13 conical surface
14 adjusting nut
15 paragraph
16 paragraph
17 paragraph
18 paragraph
19 spring

Claims (4)

1. Three-ring roller bearing for the pin ( 4 ) of the cylinders of printing machines, in particular for the pin ( 4 ) of blanket cylinders ( 7 ), with an eccentric intermediate ring bearing the raceway for an inner bearing ( 2 ) and an outer bearing ( 3 ) 6 ) which can be pivoted in the circumferential direction by actuating means ( 5 ) located outside a bearing housing ( 1 ), and with bearing rings ( 2.1 , 3.1 , 6 ) which are axially and / or radially braced against one another by suitable means ( 11 to 18 ), roller bearing rows ( 9 , 10 ) are arranged between the three bearing rings ( 2.1 , 3.1 , 6 ), so that the one-piece, eccentric intermediate ring ( 6 ) via the cylindrical roller bearing row ( 10.2 ) and the ball bearing row ( 9.2 ) with the outer bearing ring ( 3.1 ) , as well as the cylindrical roller bearing row ( 10.1 ) and the ball or cross roller axial bearing row ( 9.3 ; 9.1 ) with the inner bearing ring ( 2.1 ) forms a bearing unit and that between the inner bearing ring ( 2.1 ) and the cylinder shoulder ( 7.1 ) a spring ( 19 ), and between the inner bearing ring ( 2.1 ), eccentric intermediate ring ( 6 ) and pin ( 4 ) an adjusting nut ( 14 ), set screws or the like are arranged. 2. three-ring roller bearing according to claim 1,

• - whose crossed roller axial bearing rows or ball bearing rows ( 9.1 ; 9.3 ) are arranged at at least one axial end next to the cylindrical roller bearing row ( 10.1 ).

3. three-ring roller bearing according to claim 1 and 2,

• - its eccentric intermediate ring (6) and the outer to the outer surface slightly crowned bearing ring (3.1), by circumferentially staggered positively connected in grooves of the outer bearing ring (3.1) wedges (11) are clamped by screws (12) axial bores are attached to the bearing housing ( 1 ).

4. three-ring roller bearing according to claim 1 and 3,

• - The three bearing rings ( 2.1 , 3.1 , 6 ) are provided on at least one axial end for receiving the rows of roller bearings ( 9.1 , 9.2 , 9.3 , 10.1 , 10.2 ) on the bore and / or casing side with mutually directed shoulders ( 15 to 18 ).